T his w ork presents the design and im plem entation ofa real tim e fuzzy logic M am dani-type controller for enem y artificial intelligence (AI) in a serious gam e. T he gam e chosen is P ow er D ow n the Z om bies, a serious gam e w ith educational purposes. A prototype of th e gam e is coded in Javascript, and a com parison is m ade betw een the fuzzy enem yb ehavior and the classical, crisp one. T he results of th is w ork show the feasibility of fuzzy logic system s as a highly adequate choice for m odelling hum an-like b ehaviour and decision m aking for an elem ent in a videogam e, w ith m inim um processing costs.